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12-21-2012, 01:24 PM
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#1 |
 
Drives: FAST Join Date: Feb 2010
Location: So Cal
Posts: 299
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Air/Fuel Gauge Reading while engine braking
Is it normal for my Air/Fuel Gauge to read 20.0 when i'm engine braking / decelerating? Sorry if this is a dumb questions
 first time having a turbo car with an Air/Fuel gauge
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12-21-2012, 01:30 PM
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#2 |
Drives: 2011 Camaro SS Join Date: Dec 2012
Location: Bradenton, FL
Posts: 2,610
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DFCO...
Deceleration Fuel Cut-Off... It's still active in your tune. This will purposely put the car lean when it is decelerating to save fuel. It is fine to keep active, a lot of guys want me to remove it because it induces the popping in the exhaust. - Matt |
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12-21-2012, 01:36 PM
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#3 | |
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Drives: FAST Join Date: Feb 2010
Location: So Cal
Posts: 299
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Quote:
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12-22-2012, 01:53 AM
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#4 |
  Drives: Blown G8 GT Join Date: Apr 2010
Location: Orlando, FL
Posts: 782
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Sometimes mine goes to no value, meaning the throttle blade closes when you completely let off the throttle and coasts . Normal to me and sounds good.
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12-22-2012, 10:21 AM
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#5 |
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need....more....hp
Drives: The Neighbor Hater Join Date: Dec 2010
Location: San Mateo, CA
Posts: 4,091
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I wondered the same thing at first for a couple days, but then I was told by my tuner he can disable the DFCO, but with no exhaust it sounds like a gunshot on mine lol.
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Mast Motorsports Built LS3 Stroker 418, IPS GT35R Twin Turbos, Exedy GTO4XD Twin Disc Clutch, Aeromotive A1000 Eliminator Stealth Fuel Pump, AEM Meth Injection, DSS 1400hp Axels, BC Coilovers, Pfadt & BMR Suspension, Hawk HPS Pads, Drilled/Slotted Rotors, Hurst Shifter, Custom Roll Cage by Blu808, T3 Ports, 22" Custom Concave Mesh Rims |
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12-22-2012, 11:05 AM
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#6 | |
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Drives: 2011 Camaro SS Join Date: Dec 2012
Location: Bradenton, FL
Posts: 2,610
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Quote:
Haha that is true... It depends on the owner and the exhaust, most of the time I have requests to remove the DFCO. thebeast: You are seeing --- , that can either mean too lean off the scale (Above 18:1) or too rich off the scale (Lower than 10:1). Most likely you are "off the chart lean" when you see the --- especially on decel! |
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12-22-2012, 01:25 PM
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#7 |
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Drives: Blown G8 GT Join Date: Apr 2010
Location: Orlando, FL
Posts: 782
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Is that good or bad?
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12-22-2012, 01:34 PM
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#8 | |
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Drives: 2011 Camaro SS Join Date: Dec 2012
Location: Bradenton, FL
Posts: 2,610
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Quote:
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12-24-2012, 03:51 PM
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#9 |
 Drives: it changes Join Date: Nov 2010
Location: Norn Iron
Posts: 1,126
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It's there to reduce fuel consumption, but more importantly it's for emissions purposes.
Some cars run fine with it active, some less so and will run better with it turned off. So if you are driving and notice no negative effects, just leave as is. |
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12-24-2012, 03:55 PM
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#10 | |
Drives: ETMC built 700+hp Twin Turbo LS3 Join Date: Apr 2010
Location: Killeen, TX
Posts: 682
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Quote:
 thought i was the only one. I love it 
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12-24-2012, 05:15 PM
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#11 | |
Drives: 2011 camaro ss vortech supercharged Join Date: Aug 2011
Location: marion VA.
Posts: 524
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Quote:
 it is disabled now!
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12-24-2012, 09:04 PM
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#12 |
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Drives: ETMC built 700+hp Twin Turbo LS3 Join Date: Apr 2010
Location: Killeen, TX
Posts: 682
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ive been lucky so far...
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